Halo Alpha
Halo Alpha

This article is about disambig page. For the Battle Rifle in Halo 3, see battle rifle
and for Battle rifle, see [[{{{5}}}]].

The BR55 Heavy Barrel Service Rifle (BR55HB SR),[3] more commonly called the Battle Rifle is a UNSC infantry firearm and a newer version of the BR55 Service Rifle.

Design details[]


BR55HB SR schematic.

The BR55HB SR is a select-fire rifle first fielded in 2548 as an improved variant of the BR55 Battle Rifle. The BR55HB SR was designed to further improve on the exemplary performance of its predecessor, which had seen service for over 27 years, the entire duration of the Human-Covenant War.

The UNSC employs the Battle Rifle as a medium-range marksman rifle; it fires new 9.5x40mm ammunition from a 36 round magazine, which fits flush in the receiver. The magazine housing is built directly into the underside of the stock of the rifle and is located behind the grip. This titanium alloy weapon is gas-operated with a rotating bolt and therefore must be charged before the first round can be fired.

The charging handle used to chamber the round is located on the left side of the weapon and does not move during operation, but is pushed back during reloading. The rifle has a housed magazine in the stock. The ejection port is located on the right side of the weapon. The BR55HB SR has several noticeable differences from the BR55. It has a longer barrel for increased range and accuracy. It is also fitted with Trijicon ACOG-style optics on a modified handle and also has a trigger guard. The safety is located above the handle of the weapon.

It is never stated exactly what the maximum effective range of the BR55HB SR is. The MA5C Assault rifle, which was described as most suited for short to medium range, as opposed to the Battle Rifle's mid to long, has a maximum effective range of 300 meters and the Covenant Carbine, which is similar in use with the Battle Rifle but has a maximum range of 600 meters. It is stated that the Battle rifle could reach up to 900 meters with deadly accuracy; however, that may have been due to the design of the prototype Battle Rifle, deployed in 2524, and that field issued Battle Rifle may not have that type of range.[2]


The BR55HB SR uses a 9.5x40mm M634 X-HP-SAP. Even when fired in three-round bursts, the round produces little recoil, resulting in nearly no muzzle lift. The rifle's ammo is more effective against both shielded and unshielded Covenant infantry than the 7.62x51mm NATO used in the MA5C Assault rifle, as the increased accuracy leads to an increased amount of headshot the marksman can place on a target, and the increased kinetic energy of the round leads to faster shield depletion and increased damage to unshielded enemies.


The BR55HB SR has reasonably high power, a decent rate of fire, and high accuracy with its 2x magnification scope. Its range is its primary advantage, allowing the rifleman to engage at longer ranges by leading shots. The BR55HB SR has slightly lower recoil than its BR55 predecessor and has less muzzle flash, although the rounds fired are still visible in the air; the rifle's updated design also boosts range and accuracy, increasing the effectiveness of the 9.5mm rounds it fires. The scope of the BR55HB SR allows a skilled marksman to easily take down an unshielded target from medium range, making the battle rifle the best alternative to the high-powered sniper rifle system that the UNSC provides for its marksmen.


Attempting to engage a target at longer ranges requires more rounds and less movement as the rounds become inaccurate over longer ranges, while in close quarters combat it is fairly surpassed by the Covenant Carbine in terms of killing the opponent quickly with a headshot. Furthermore, its magazine can be depleted rather quickly. The weapon requires a good amount of skill to use it. The user must have an understanding of how the weapon works, and what to do with it when a situation arises.

Each bullet fired from the weapon can act as a tracer, and can give away the shooter's position, putting them at risk of return fire. While effective at long range against light or unshielded targets, the BR55HB's performance against shielded infantry at close range is extremely challenging; the BR55HB, while still very effective, is not the weapon of choice at close range because of its design, and the fact that it can be easily overpowered by the Shotgun and Energy Sword.

Changes from the BR55 in Halo 2[]

  • Modified optical rail.
  • New Trijicon ACOG-style scope.
  • New trigger guard.
  • Longer barrel.
  • New reloading animation.
  • Less aim-assist/magnetism, harder to aim.
  • Slightly different firing sound.
  • Slightly slower rate of fire.
  • Slight decreased accuracy/greater spread.
  • Slower rounds - via notably decreased projectile velocity, leading shots are needed from longer range.


An important thing to note is that the BR55HB SR can be used to great effect at medium to long-range. The trick with making the Battle Rifle effective at long range is minimizing the operator's side-to-side movement. Strafing while firing greatly decreases the efficiency of the rifle. Additionally, while firing at a moving target it is important to aim in front of the target, especially when the target is moving perpendicular to the aim of the rifleman.


  • The BR55HB SR Battle Rifle is an effective weapon against all types of enemies, from Grunts to Brutes and even Flood. When engaging Brutes, always remember to aim at the center of mass until the power armor is disabled, then aim for the head. When engaging Flood, aim for the center of the combat form as taking out the infection form in the chest cavity will kill it instantly.
  • For targets on foot, it is optimal to aim 0.75-1.00 head-widths in front of the target to guarantee the maximum possible number of rounds impact the target. For targets in vehicles, it is ideal to aim 1.75-2.5 head-widths in front of the target. Attempting use of a BR55HB SR Battle Rifle against vehicles at the great range is not advised. Odds are the vehicle you are trying to take down is not an immediate threat that the rifleman needs to eliminate and he should shift his focus to a more readily available target, for instance, infantry like Grunts. Battle Rifles are good for headshots on Grunts on any difficulty.


  • In multiplayer, it takes three bursts followed by a headshot to kill a fully shielded SPARTAN-II or Elite (the bullets do equal damage on any part of a shielded body).
  • Another use of the BR is to melee (beat down), then get a headshot for an instant kill. This is much more effective than shooting then meleeing, seeing as this would take at least three bursts before the melee would kill the opponent. This is much less effective than in Halo 2 when there was a button glitch which made it much easier. The method is not recommended unless they are unaware of you, because you may get hit back if they fired first and die.
  • In multiplayer (preferably Team SWAT), you can "twitch fire" the rifle so that you can execute an easy headshot. The way it can be executed is as follows: just when you fire at mid-lower chest area of your target, "twitch" the reticle upwards and the three bullets will separate, thus decreasing its accuracy but creating a greater headshot hitbox.

Advanced Tactics[]

  • A well-known tactic, known as the "Noob Combo," is to use an overloaded Plasma Pistol shot to remove the shields of an opponent, then immediately follow up with a Headshot to kill the opponent.
  • Another useful Battle Rifle tactic is to use a Sniper Rifle shot to reduce the shields of a target, then switch to the Battle Rifle for an easier headshot. This is more useful at long ranges, where the opponent has a CQB or a slow explosive weapon. This tactic is better for inexperienced snipers to use, as it uses less ammunition than two sniper body shots.
  • Arguably, the best equipment combined with the Battle Rifle is the Power Drain. By throwing down the power drain, the shields of your enemies are instantly brought down, thus allowing for an easy one-shot kill with minimal ammunition usage. This is more suited for ambushes, as it takes a few seconds to deploy the power drain. The power drain is especially useful on levels that involve lifts, for example, Construct. As mentioned previously, a Frag Grenade can be used in its place, such as on Guardian.




Related Pages[]